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AH = 99h DS:BX -> memory location to block on CX = timeout in milliseconds DH = nonzero if interruptable
Return:
CF clear if awakened by event AX = 0000h CF set if unusual wakeup ZF set if timeout, clear if interrupted by signal AX = nonzero
Desc: Suspend calling process until another process sends a "restart" signal or a timeout occurs
See Also: AH=9Ah - INT 2F/AX=0802h
Category: DOS Kernel - Int 21h - E
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